<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :current="true">
			<swiper-item v-for="(item, i) in goods_info.pics" :key="i">
				<!-- 将当前点击的图片索引传递到preview()处理函数中 -->
				<image :src="item.pics_big" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="price">￥{{goods_info.goods_price}}</view>
			<!-- 信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品名称 -->
				<view class="goods-name">{{goods_info.goods_name}}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">快递 免运费</view>
		</view>
		
		<!-- 商品详情信息 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		
		<!-- 商品导航组件区域 -->
		<view class="goods_nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick"></uni-goods-nav>
		</view>
	</view>
</template>

<script>
// 按需导入Vuex中的辅助方法
import { mapState, mapMutations, mapGetters } from 'vuex'
	
	export default {
		data() {
			return {
				// 商品详情对象
				goods_info: {},
				// 底部左侧按钮组的配置对象
				options: [{
					icon: 'shop',
					text: '店铺'
				}, {
					icon: 'cart',
					text: '购物车',
					info: 0
				}],
				// 底部右侧按钮组的配置对象
				buttonGroup: [{
					text: '加入购物车',
					backgroundColor: '#ff0000',
					color: '#fff'
				}, {
					text: '立即购买',
					backgroundColor: '#ffa200',
					color: '#fff'
				}]
			};
		},
		onLoad(options) {
			// 获取商品id
			const goods_id = options.goods_id
			// 调用获取商品详情的方法
			this.getGoodsDetail(goods_id)
		},
		methods: {
			// 获取商品详情数据
			async getGoodsDetail(goods_id) {
				const {data: res} = await uni.$http.get('/api/public/v1/goods/detail', {goods_id})
				if (res.meta.status !== 200) return uni.$showMsg()
				// 对数据进行处理---解决图片底部空白间隙问题
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display: block;"').replace(/webp/g, 'jpg')
				this.goods_info = res.message
			},
			// 实现轮播图的预览效果
			preview(i) {
				// 调用uni.previewImage预览图片
				uni.previewImage({
					current: i,
					// 所有图片地址的url数组
					urls: this.goods_info.pics.map(x => x.pics_big)
				})
			},
			// 跳转到购物车页面
			onClick(e) {
				console.log(e)
				if(e.content.text === '购物车') {
					uni.switchTab({
						url: '/pages/cart/cart'
					})
				}
			}, 
			buttonClick(e) {
				if (e.content.text === '加入购物车') {
					// 先组织商品的信息对象
					const goods = {
						goods_id: this.goods_info.goods_id,
						goods_name: this.goods_info.goods_name,
						goods_price: this.goods_info.goods_price,
						goods_small_logo: this.goods_info.goods_small_logo,
						goods_state: true,
						goods_count: 1,	
					}
					// 调用addToCart方法
					this.addToCart(goods)
				}
			},
			...mapMutations('m_cart', ['addToCart']),
		},
		computed: {
			// 调用mapState方法,把m_cart模块中state的cart数组映射到当前页面,作为计算属性来使用
			...mapState('m_cart', []),
			...mapGetters('m_cart', ['total'])
		},
		watch: {
			// 监听total值的变化---这种方法页面首次渲染不会被调用
			// total(newVal) {
			// 	const findResult = this.options.find(x => x.text === '购物车') 
			// 	if (findResult) {
			// 		// 通过监听动态为购物车info属性赋值 
			// 		findResult.info = newVal
			// 	}
			// }
			
			total: {
				handler(newVal) {
					const findResult = this.options.find(x => x.text === '购物车')
						if (findResult) {
							// 通过监听动态为购物车info属性赋值 
							findResult.info = newVal
						}
				},
				// 用来控制页面首次加载后立即调用
				immediate: true
			}
		}
	}
</script>

<style lang="scss">
swiper {
	height: 750rpx;
	image {
		width: 100%;
		height: 100%;
	}
}

.goods-info-box {
	padding: 10px;
	padding-right: 0;
	.price {
		color: #c00000;
		font-size: 18px;
		margin: 10px 0;
	}
	.goods-info-body {
		display: flex;
		justify-content: space-between;
		.goods-name {
			font-size: 13px;
			margin-right: 10px;
		}
		.favi {
			width: 120px;
			font-size: 12px;
			display: flex;
			flex-direction: column;
			align-items: center;
			justify-content: center;
			border-left: 1px solid #efefef;
			color: gray;
		}
	}
	.yf {
		font-size: 12px;
		color: gray;
		margin: 10px 0;
	}
}

.goods_nav {
	position: fixed;
	bottom: 0;
	left: 0;
	width: 100%;
}

.goods-detail-container {
	padding-bottom: 50px;
}
</style>
